Why winter is favourable to coronavirus and weakens the immune system
Many types of viruses thrive in favourable conditions in winter. They can survive for long periods in the dry, cold air, and people spend more time indoors. On the other hand, our immune system weakens due to the dry air and lack of sunshine. This combination makes coronavirus and other pathogens more dangerous in winter than in summer. However, humidifiers and air purifiers can help to keep us healthy throughout the cold months.
Viruses are travelling farther and surviving for longer
The annual winter waves of flu and colds demonstrate that many viruses thrive more easily during the colder months. The pathogen SARS-CoV-2, trigger of the respiratory illness COVID-19, is also one of these "winter viruses". One of the reasons for this is the low relative air humidity level in Central Europe in winter. When this dry air enters a room and heats up, the relative air humidity level drops further, creating the optimal conditions for viruses to survive. Humidifiers can be used to establish a relative air humidity of 40–60%, which means that the survival period of coronaviruses is considerably shorter.
The small droplets of saliva in which viruses enter the air unprotected evaporate very slowly in winter. As a result, the pathogens are able to travel longer distances. Therefore, the safety distance of 1.5 m from other people may not be enough in winter. What's more, coronaviruses are largely protected against high-energy UV radiation during months when there is little sunshine, whereas this UV radiation kills some of them in summer.
Dry air and lack of vitamin D put strain on the immune defence system
Many people have a vitamin D deficiency during the winter months, which weakens their immune system. In addition, the winter air obstructs mucociliary transport which our nasal and bronchial system uses to stave off a large proportion of viruses. During this process, microscopic cilia transport the pathogens out of the bronchia and nose and into the throat and laryngeal area. From here they enter the stomach where they cannot cause any harm. Mucociliary transport slows down in cold, dry air. In this case too, a humidifier can provide relief as moist air prevents the mucous membranes from drying out. Furthermore, many of the fine droplets measuring less than 1 μm, which can penetrate deep into the respiratory tract, become less infectious when the relative air humidity is high.
The spread of viral illnesses in winter is also increased by social factors. Due to low temperatures, people spend more time in enclosed spaces, which in turn means that the risk of becoming infected with coronavirus is comparatively high.
Air purifiers as a complementary preventive measure
Besides wearing a mouth and nose covering, keeping a minimum distance from others, frequently washing your hands and disinfecting surfaces, thorough airing also contributes towards reducing the viral load in rooms. The high temperature difference between the outdoor and indoor air ensures that air is exchanged very efficiently in winter. On the other hand, it is virtually impossible to maintain a pleasant air temperature due to the entry of cold outdoor air. In school classrooms especially this can lead to problems and affect the students' performance. What's more, the cold outdoor air warms up in the room and as a result becomes even drier – to the benefit of the viruses in the air and to the detriment of the people in the room and their mucous membranes.
Therefore, air purifiers can also be installed to remove a large proportion of the viral load from the room air. These devices should be equipped with efficient filters (such as a HEPA filter) as well as powerful fans that can circulate the room air at least six times per hour. By using an appropriate air filtration device, a low viral load can be ensured even when a room is rarely aired.
Air purifier deviro™
The deviro™ cleans room air of fine dust, viruses and other elements that are harmful to health using a three-phase filtration system.
The dehumidifiers are used when perishable goods are being stored that would otherwise be damaged by moist air.
With the heat pumps from FrigorTec, the energy of a warm aeration / gas removal or waste water is usually exploited.
Snowkeeper SK 12
With the cooling device for snow conservation, the snow-making process in artificial snow areas can be reduced significantly.
More know-how articles
Powerful, thorough, quiet: How do air purifiers work?
The filter and fan of an air purifier determine the type and quantity of pollutants it can remove from the room air. Other features such as noise emissions provide information about the locations for which an air filter device is suitable.
Correctly positioned air purifiers complement regular airing
The viral load of indoor air can be significantly reduced by regular airing combined with the use of air purifiers. These also make it possible to remove coronaviruses, fine dusts, and bacteria, even in rooms without windows, and in crane driver cabs. In order to achieve an even distribution of purified air, some rules should be observed when setting up an air filter device.
Why room air hygiene should also be given priority after Corona
The Corona pandemic has abruptly brought home to us how air in indoor spaces is often contaminated and dangerous to health. Air purifiers protect us from viruses, fine dust, mould spores and other airborne contaminants that will continue to affect our health and well-being after the current pandemic has been contained.
Reduce the need for artificial snowmaking with snow cooling units
Artificial snow sysems secure economic viability in many ski regions. At the same time, they attract criticism due to their high water and energy requirements. Snow cooling units offer operators the chance to reduce their artificial snow requirements while saving costs and resources.
HEPA Filters: Using physical tricks to capture particles
HEPA filters are among the most efficient mechanical filters and remove up to 99.995% of contaminants from the air. They rely on the movement characteristics of different small particles to do so. Based on standardised filter classes, inefficient HEPA filters are easily distinguished from HEPA filters that are actually effective.
How air purifiers can contribute to improving health protection
The question of whether or not mobile air purifiers reduce the risk of viral disease and can help to improve health protection can be answered with a ‘yes’. That is what the current study by the Institute of Fluid Mechanics and Aerodynamics at Universität der Bundeswehr München has found.
Arrange a consultation appointment
Our experts will be happy to advise you on the planning and implementation of your projects. Together we will find a perfect customised solution.Arrange an appointment